WO2015160472A1 - Ensemble connecteur pour fibres optiques - Google Patents

Ensemble connecteur pour fibres optiques Download PDF

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Publication number
WO2015160472A1
WO2015160472A1 PCT/US2015/021900 US2015021900W WO2015160472A1 WO 2015160472 A1 WO2015160472 A1 WO 2015160472A1 US 2015021900 W US2015021900 W US 2015021900W WO 2015160472 A1 WO2015160472 A1 WO 2015160472A1
Authority
WO
WIPO (PCT)
Prior art keywords
cable
optical fiber
cylindrical portion
cross
fiber cable
Prior art date
Application number
PCT/US2015/021900
Other languages
English (en)
Inventor
Jimmy Jun-Fu Chang
Paul Newbury
Original Assignee
Senko Advanced Components, Inc.
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Senko Advanced Components, Inc. filed Critical Senko Advanced Components, Inc.
Priority to EP15779666.5A priority Critical patent/EP3132297B1/fr
Priority to CN201580005812.8A priority patent/CN105934694A/zh
Publication of WO2015160472A1 publication Critical patent/WO2015160472A1/fr

Links

Classifications

    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3887—Anchoring optical cables to connector housings, e.g. strain relief features
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3833—Details of mounting fibres in ferrules; Assembly methods; Manufacture
    • G02B6/3855—Details of mounting fibres in ferrules; Assembly methods; Manufacture characterised by the method of anchoring or fixing the fibre within the ferrule
    • G02B6/3857—Crimping, i.e. involving plastic deformation
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B6/00—Light guides; Structural details of arrangements comprising light guides and other optical elements, e.g. couplings
    • G02B6/24—Coupling light guides
    • G02B6/36—Mechanical coupling means
    • G02B6/38—Mechanical coupling means having fibre to fibre mating means
    • G02B6/3807—Dismountable connectors, i.e. comprising plugs
    • G02B6/3873—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls
    • G02B6/3874—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules
    • G02B6/3878—Connectors using guide surfaces for aligning ferrule ends, e.g. tubes, sleeves, V-grooves, rods, pins, balls using tubes, sleeves to align ferrules comprising a plurality of ferrules, branching and break-out means
    • G02B6/3879—Linking of individual connector plugs to an overconnector, e.g. using clamps, clips, common housings comprising several individual connector plugs

Definitions

  • each individual fiber is generally connected to both a source and a destination device. Additionally, along the fiber optic run between the source and the destination, various connections or couplings may be made on the optical fiber to adjust the length of the fiber or to provide termination connection ports for end users at which one or more fibers may be branched from a feed cable.
  • Each connection or coupling requires a connector and adaptor to align the fibers such that the light can transmit without interruption, and in instances when the connection may be exposed to weather conditions, an essentially waterproof configuration of components.
  • an optical connector should join optical fibers with a minimum of insertion loss, and should provide mechanical stability and protection to the junction between the fibers in the operating environment. In general, the stability and protection of the fiber junction may be determined by the connector design.
  • Standard connector designs may not provide a means for a weather tight seal or similar environmental protection, and if used in a location where access is not protected, cables may be jostled or pulled, and possibly become loose or completely disengaged from their connector assemblies. Standard connectors may therefore not be rugged enough for use in extreme environments or locations where the cable connections is not well protected. Therefore, there remains a need for a ruggedized, connector assembly that is easy to install while also meeting the necessary performance requirements.
  • a cable retention member may be provided within the assembly to engage the cable with the housing.
  • an optical fiber cable connector includes a connector housing.
  • the connector housing has a first end and a second end spaced longitudinally from the first end, and the housing defines an internal chamber extending between the first end and the second end, the chamber having at least one first cross-sectional dimension, and the second end having a cable passage for receiving an optical fiber cable therethrough for entry of the optical fiber cable into the internal chamber.
  • the cable passage defines at least one second cross-sectional dimension, the second cross-sectional dimension being less than the first cross-sectional dimension to define an internal shoulder disposed radially about at least a portion of the cable passage.
  • the optical fiber cable connector also includes at least one optical fiber connector disposed within the first end of the connector housing and connected to at least one optical fiber of the optical fiber cable, and a cable retention element disposed within the internal chamber about the optical fiber cable.
  • the cable retention element includes a retention member, and the retention member includes a cylindrical portion disposed about at least a portion of the optical fiber cable, the cylindrical portion having a first end and a second end spaced from the first end, with the at least one optical fiber extending through the cylindrical portion from the first end through the second end, and a radial flange extending radially from the cylindrical portion adjacent the second end of the cylindrical portion, the radial flange defining a third cross-sectional dimension less than or equal to the first cross-sectional dimension and greater than the second cross-sectional dimension for engaging the shoulder of the cable passage and preventing entry of the radial flange into the cable passage.
  • the cable retention element also includes a crimp tube having a first end disposed about and crimped to the optical fiber cable, and a second end spaced from the first end and disposed about and crimped to the cylindrical portion of the first retention member to retain the first retention member with the optical fiber cable.
  • a cable retention element for retaining an optical fiber cable with a fiber optic cable connector includes a first retention member and a crimp tube.
  • the first retention member includes a cylindrical portion for being disposed about at least a portion of an optical fiber cable, the cylindrical portion having a first end, a second end spaced from the first end, and a central passage extending from the first end to the second end.
  • the retention member also includes a radial flange extending radially outwardly from the cylindrical portion adjacent the second end of the cylindrical portion, the radial flange being configured for engaging with a portion of a fiber optic cable connector.
  • the crimp tube has a first end for being disposed about and crimped to the optical fiber cable, and a second end spaced from the first end for being disposed about and crimped to at least the first end of the cylindrical portion of the first retention member to retain the first retention member with the optical fiber cable.
  • a method for retaining a fiber optic cable with an optical fiber cable connector.
  • the fiber optic cable includes at least one protective layer disposed about at least one optical fiber.
  • the method includes inserting the optical fiber cable through a first end of connector housing and through an internal chamber of the connector housing, wherein the connector housing has a second end spaced longitudinally from the first end with the internal chamber extending between the first end and the second end, the first end including a cable passage for receiving the fiber optic cable therethrough, the cable passage having a first cross-sectional dimension, and the first end defines an internal shoulder within the internal chamber and disposed radially about at least a portion of the cable passage.
  • the method also includes removing a portion of the at least one protective layer of the optical fiber cable to expose a length of the at least one optical fiber, and provide a protective layer end about the at least one optical fiber, and installing a crimp tube about the fiber optic cable, the crimp tube having a first end and a second end spaced from the first end, the first end including at least one radially inwardly extending tooth for engaging into the at least one protective layer of the optical fiber cable.
  • the method also includes inserting the at least one optical fiber through a cable retention member to at least abut a first end of the cable retention member with the protective layer end, wherein the cable retention member includes a cylindrical portion defining the first end, and having a second end spaced from the first end, the cylindrical portion defining a first diameter, and the first end comprising at least one radially outwardly extending annular ring defining a second diameter greater than the first diameter, and the cable retention member also includes a radial flange extending radially from the cylindrical portion adjacent the second end of the cylindrical portion, the radial flange defining a second cross-sectional dimension greater than the first cross-sectional dimension for engaging with the internal shoulder about the cable passage and preventing entry of the radial flange into the cable passage.
  • the method also includes disposing the second end of the crimp tube about the cylindrical portion of the retention member, crimping the second end of the crimp tube about the cylindrical portion of the retention member to reduce an internal diameter of second end of the crimp tube to a diameter less than the second diameter defined by the annular ring, crimping the first end of the crimp tube about the fiber optic cable to engage the at least one tooth into the at least one protective layer, installing at least one optical fiber connector onto the at least one optical fiber, and pulling the optical fiber cable back through the connector housing to abut the radial flange with the internal shoulder wherein abutment of the radial flange with the internal shoulder retains the fiber optic cable with the optical fiber cable connector.
  • FIG. 1 depicts a perspective view of a dual LC optical fiber connector according to an embodiment.
  • FIG. 2A provides a side view of the connector of FIG. 1 according to an embodiment.
  • FIG. 2B provides a cross-sectional view of the connector of FIG. 2A according to an embodiment.
  • FIG. 2C depicts a detail of a cable retention device shown in FIG. 2B according to an embodiment.
  • FIG. 3 is a detailed cross-sectional view of a fiber optic cable crimped and retained by a cable retention device according to an embodiment.
  • FIG. 4 depicts an installation of a cable retention device on a dual fiber optic cable according to an embodiment.
  • FIG. 5 depicts a partially exploded view of cable connector assembly according to an embodiment.
  • FIGS. 6A-6C depict an end view of a crimp ring according to an embodiment.
  • FIGS. 7A-7C depict a side view of a retention post according to an embodiment.
  • FIGS. 8A and 8B show perspective views of a cable retention device in relation to a terminal housing portion according to an embodiment.
  • FIGS. 9A and 9B depict a configuration of a connector with a cable retention device according to an embodiment.
  • FIG. 10 depicts an alternative configuration of a crimp ring according to an embodiment.
  • FIGS. 1, 2A and 2B depict views of a fiber optic connector assembly 10. While the depicted fiber optic connector 10 is of a dual LC type connector, any description and drawings presented herein are also applicable to other types of fiber optic connectors, such as, for example, MPO, MT-RJ, APC (Angled Polished Connector), SC, SC APC, FC, FC APC, ST, LC APC, dual or simplex, with multi-mode or single-mode fibers.
  • the connector assembly 10 features push-pull insertion and a bayonet-style mechanical latch 12 to connect the assembly to a terminal device or another cable.
  • the connector 10 may include a housing component 14, a tailpiece of a sealing fitting 16 and a flexible boot 18, and an optical connector sub-assembly 20.
  • the housing component 14 may define an internal chamber 15 configured for receiving at least one optical fiber (such as fibers 102 in FIGS. 4, 5) therethrough.
  • the optical connector subassembly 20 may seat within the housing 14, and may include an adapter clip 22 and a pair of optical connectors 24 mounted side-by-side within the clip.
  • the optical connectors 24 may terminate optical fibers (for example, fibers 102 such as are depicted in FIG. 4) of a fiber optic cable 100 and may be any suitable type of connector for providing this function.
  • the terminal optical connectors 24 may be slidably insertable into the clip 22, and the clip may be slidably insertable into an opening 28 in a first end 14a of the housing 14.
  • At least one of the housing 14 and clip 22 may be configured with a releasable catch configured for retaining the clip within the housing.
  • a second end 14b of the housing 14 may be configured for attachably receiving the fitting 16.
  • the fitting 16 may include a first end 16a that is threaded to engage with a threaded portion of the housing end 14b.
  • a second end 16b of the fitting 16 may be configured for attachably receiving the boot 18.
  • the second end 16b may be internally threaded to engage with an externally threaded portion of a first end 18a of the boot 18.
  • the fitting 16 may define a cable passage 17 extending through the fitting from the first end 16a to the second end 16b.
  • the boot 18 may include a cable passage 19 for passage of a cable 100 therethrough.
  • the connector 10 is configured for receiving a fiber optic cable 100 therein.
  • the cable 100 may be a simplex cable, a duplex cable, a multi-fiber cable, or any fiber optic cable that is appropriate for the above-listed connectors.
  • a cable retention device 30, shown in additional detail in FIG. 2C may be provided to engage the cable 100 within the connector in a manner as depicted in FIG. 3. With the cable retention device 30 holding the cable 100 within the connector 10, the amount of force needed to pull the cable from the connector is substantially increased. In an embodiment, the amount of force needed to pull the cable from the connector may be increased by at least a factor of about 9 over a connector that does not include such retention device.
  • the amount of pull force required to pull a cable retained by the retention device 30 from a connector 10 may be at least about 450N (lOOlbs).
  • the cable retention device 30 may include a T-shaped component 32 having a cylindrical post 34 with a radially extending flange 36, and a crimp ring 40 that fits about the post and is crimpable about the post.
  • Fig. 4 shows a perspective view of the T-shaped component 32 and crimp ring 40
  • Fig. 5 shows the crimp ring disposed about the cylindrical post 34.
  • the T-shaped component 32 and crimp ring 40 may be formed of a metal, such as aluminum, or nickel plated brass, or any other appropriate types of metals or materials that may be crimped together.
  • the T-shaped component 32 and crimp ring 40 may be formed of the same metal.
  • each of the T-shaped component 32 and crimp ring 40 may be formed of different metals.
  • a first end 40a of the crimp ring 40 may include at least one radially inwardly projecting tooth 44.
  • the teeth 44 may be disposed circumferentially about the first end 40a of the crimp ring 40 and spaced apart from one another.
  • FIG. 6C provides a cross-sectional view of teeth 44a, having an alternative cross-sectional configuration.
  • the teeth 44 may be spaced axially from the end 40a.
  • teeth 44 may be disposed at the end 40a, as shown, and additional teeth 44 may be provided, for example, in at least one addition ring of such teeth spaced axially away from the teeth at the end.
  • teeth 44 may be provided with various different spacings between the teeth, or randomly within the crimp ring 40.
  • a radially inwardly extending circumferential ring may be provided instead of individual teeth.
  • the end 40a may include a marking, such as a line or groove 41 that indicates the end of the cylinder that has the teeth, thereby making it easier to install the crimp ring on a cable.
  • a first end 34a of the post 34 may include at least one radially outwardly projecting element or tooth 46.
  • the projecting element may be a ridge 46 that may be disposed circumferentially about the first end 34a of the post 34.
  • FIG. 7C provides an alternate embodiment of a ridge 46a having an alternative cross-sectional configuration. While not depicted, the ridge 46 may be disposed spaced axially away from the end 34a, or at least one additional ridge may be provided, for example, spaced axially from the ridge at the end. Alternatively, the ridge may not be continuous along the entire circumference, and in essence, may be configured as circumferentially disposed teeth.
  • a crimp ring 140 may have alternative configurations to adapt and attach cables of different diameters to the back post.
  • a crimp ring 140 may be a reducing ring wherein a diameter of the cable is greater than a diameter of the back post, or an enlarging ring wherein a diameter of the cable is less than a diameter of the back post.
  • a fiber optic cable 100 may be inserted through the boot 18, the fitting 16, and the housing 14, and the retention device 30 may be fastened to the cable.
  • the fiber optic cable 100 may be stripped of a portion of its outer layers 104, 105 to expose fiber strands 102.
  • Fiber strands 102 may include an inner core 107 and a protective sheath 108.
  • the cable 100 may be inserted at least partially through the crimp ring 40 through the first end 40a, or alternately, the crimp ring may be pushed onto the cable, so that the jacketed cable extends approximately half-way through the crimp ring.
  • the jacketed cable 100 may extend through the crimp ring 40 along at least a portion of the length of the crimp ring, such as, for example, about 1/4, about 1/3, about 2/3, about 3/4, or any fraction between any of the listed values, of the length of the crimp ring.
  • the first end 40a of the crimp ring 40 may be crimped onto the cable 100 to force teeth 44 into the outer jacket 104 of the cable. When crimped in place, the teeth 44 of the crimp ring 40 bite into the outer jacket 104 to provide a retention mechanism for retaining the cable 100 within the crimp ring.
  • Post 34 may be inserted into the second end 40b of the crimp ring 40, and the second end of the crimp ring may be crimped to the post 34 so that the crimp ring diameter at the second end 40b is reduced to be less than the external diameter at the ridge 46, as depicted by the crimp ring/post configuration shown at A in the bottom half of FIG. 3.
  • the ridge 46 may thereby inhibit removal of the post 34 from the crimp ring, while the teeth 44 inhibit removal of the cable 100 from the crimp ring, thereby retaining the cable with the post 34.
  • At least one reinforcement member 106 (Kevlar or aramid fibers, for example) of the cable 100 may be crimped between the post 34 and the crimp ring 40 to provide an additional retentive configuration for holding the cable with the post.
  • a reduction of the diameter of the end 40b of the crimp ring 40 will inhibit removal of the post from the crimp ring. Additional cable retention may then be provided by the crimp fastened reinforcement member 106, wherein if the cable 100 is disengaged from the teeth 44, the bound reinforcement member may still provide a retentive function for keeping the cable in the connector.
  • an end portion of the outer layer 105 may extend into the post 34.
  • the layer 105 may, in an embodiment, extend into the post 34, at least to the flange 36. In an alternate embodiment, the outer layer 105 may extend completely through the post 34 and beyond the flange 36.
  • an opening 28 in the housing 14 may be sized and configured for receiving the adapter clip 22 therein.
  • the flange 36 of the T-shaped component may be configured to fit through the opening 28 as shown in FIGS. 8A and 8B.
  • the cable/retention member assembly may be pulled back through the housing 14 to seat the retention member against the surface 16c of the fitting 16 in the position as shown in cross- section in FIGS. 2C and 3, and in perspective as shown in FIGS. 9A and 9B (cable not shown). So that the flange 36 may pass through the opening 28 yet still be retained by the fitting 16, the flange may have a dimension along the axis 70, for example, that is configured to fit through a narrower dimension of the opening 28, while a dimension along the axis 72, for example, may be larger than the diameter of the passage 17 of the fitting 16.
  • the flange would not need to fit through the opening 28, and the flange could be circular about its periphery so that the entire flange has a diameter that may be greater than the diameter of the passage 17.
  • compositions, methods, and devices are described in terms of “comprising” various components or steps (interpreted as meaning “including, but not limited to”), the compositions, methods, and devices can also “consist essentially of or “consist of the various components and steps, and such terminology should be interpreted as defining essentially closed-member groups.
  • a range includes each individual member.
  • a group having 1-3 cells refers to groups having 1, 2, or 3 cells.
  • a group having 1-5 cells refers to groups having 1, 2, 3, 4, or 5 cells, and so forth.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Optics & Photonics (AREA)
  • Mechanical Coupling Of Light Guides (AREA)

Abstract

Connecteur à sertir permettant d'améliorer la rétention en traction d'un câble de fibre(s) optique(s) dans un boîtier d'un ensemble connecteur pour fibres optiques. Le connecteur possède une bride destinée à venir en contact avec le boîtier et un élément de sertissage destiné à venir en contact avec le câble.
PCT/US2015/021900 2014-04-18 2015-03-21 Ensemble connecteur pour fibres optiques WO2015160472A1 (fr)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP15779666.5A EP3132297B1 (fr) 2014-04-18 2015-03-21 Ensemble connecteur pour fibres optiques
CN201580005812.8A CN105934694A (zh) 2014-04-18 2015-03-21 光学纤维连接器组件

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US14/256,620 US9297964B2 (en) 2014-04-18 2014-04-18 Optical fiber connector assembly
US14/256,620 2014-04-18

Publications (1)

Publication Number Publication Date
WO2015160472A1 true WO2015160472A1 (fr) 2015-10-22

Family

ID=54321901

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/US2015/021900 WO2015160472A1 (fr) 2014-04-18 2015-03-21 Ensemble connecteur pour fibres optiques

Country Status (5)

Country Link
US (3) US9297964B2 (fr)
EP (1) EP3132297B1 (fr)
CN (1) CN105934694A (fr)
TW (1) TW201543096A (fr)
WO (1) WO2015160472A1 (fr)

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CN105934694A (zh) 2016-09-07
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US20150301294A1 (en) 2015-10-22
US9664865B2 (en) 2017-05-30
EP3132297A4 (fr) 2017-12-20
EP3132297A1 (fr) 2017-02-22
US20160291262A1 (en) 2016-10-06
US20170261700A1 (en) 2017-09-14
US9297964B2 (en) 2016-03-29

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